US4134657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating the advancing of film in a camera being taken up or rewound
Assignee: Pentax Corp
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Filing: 1977-09-02
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Granted: 1979-01-16
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Expires: 1997-09-02
Abstract
Abstract A camera in which a roll of film is employed is provided with a device for indicating the advancing of film being taken up or rewound. A friction member is rotatably mounted on the film take-up spool shaft but does not rotate with the shaft unless film is wound around the friction member. The friction member is provided with a cam portion which is engaged by one end of an indication lever. The other end of the indication lever is provided with a striped or other pattern which is viewable through a window in the camera body. Alternatively, a portion of the friction member could be directly viewed through the window.
Inventors
- 👤 Katsuhiko Nomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:07
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/40; G03B1/02; G03B1/04; G03B1/06; G03B1/60; G03B17/00; G03B17/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
In a camera employing a roll of film and having a film take-up spool mounted on a spool shaft, a device for indicating the advancing of the film being taken up or rewound comprising: a friction member rotatably mounted on said spool shaft, said friction member rotating with said spool shaft only when film is wound around said friction member, and means viewable from the outside of the camera for indicating the rotation of said friction member.
Claim 2
Dependent Claim
77 words
In a camera employing a roll of film and having a film take-up spool mounted on a spool shaft, a device for indicating the advancing of the film being taken up or rewound comprising: a friction member rotatably mounted on said spool shaft, said friction member rotating with said spool shaft only when film is wound around said friction member, and means viewable from the outside of the camera for indicating the rotation of said friction member.
Claim 3
Dependent Claim
47 words
The indicating device as recited in claim 1 wherein said friction member is provided with a cam and said indicating means includes an indication lever one end of which engages said cam and the other end of which is viewable through a window in the camera body.
Claim 4
Dependent Claim
28 words
The indicating device as recited in claim 1 wherein said indicating means is a portion of said friction member directly viewable through a window in the camera body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |